U DC 621'865'2

IS : 704 - 1984
Indian Standard

(Reaffirmed 2005)

m

1

I

SPECIFICATION FOR CROW-BARS AND CLAW-BARS (
Covers the dimensional Second Revision )

1. scope 2. Types -

and other requirements
types :

for crow-bars

and claw-bars.

The bars shall be of the following crow-bar crow-bar ( ordinary) with

a) Octagonal b) Octagonal

with chisel and hammer ends,

bent chisel and point ends, and straightening, with chisel and hammer ends, `\.

c) Round crow-bar, d) Round crow-bar e) Round crow-bar f ) Round crow-bar g) Square crow-bar h) Claw-bar, and

packing (ordinary) with with

chisel and claw ends, chisel and point ends,

with chisel and hammer ends,

j ) Fireman's crow-bar. 3. Shapes, Dimensions and Tolerances and dimensions of different types of crow-bars

3.1 Shapes and Dimensions - The general shapes and claw-bars shall be as shown in Tables 1 to 9.

3.2 Tolerances - The permissible tolerances on width across flats and diameters of bars shall be as specified in IS : 3739-l 972 `Dimensional tolerances for carbon and alloy constructional steel products'. and are for the The tolerances on length shall be _`zi mm. Other dimensions are recommendatory guidance of the manufacturers. 4. Mass - The mass of the bars as given in respective guidance of the manufacturers and the purchasers. 5. Material Suitable quality steel meeting the requirements tables is recommendatory in 6 and 8. and is for the

as laid down

Suitable Example : Steel designation T-60 of schedule VI of IS : 1570-1961 `Schedules for wrought steels for general engineering purposes', with maximum phosphorous and sulphur content of 0'05 percent each. `6. Hardness - The bars shall be heat treated to obtain a minimum hardness value of 320 HV. The test point shall be anywhere on the working end or on the straight portion nearest to the working end. 7. Manufacture and Finish

7.1 The bars shall be forged clean and in one piece from either octagonal, round or square bars as the case may be. These shall be reasonably well shaped and free from flaws, seams or other defects. 7.2 Cutting 8. Tests 8.1 Drop Test - The bar shall be held vertical with the working end downward at a height of 600 mm This over a block of grey cast iron of at least 150 mm in thickness and freely dropped on the block. shall be repeated five times. Where both the ends are the working ends, the test shall be carried on separately for both ends. The ends shall not show any sign of fracture or deformation after the test. 8.1.1 The above test shall not be applicable ends (see Table 5 ). to claw end of the round crow-bars with chisel and claw ends of the bars may be rounded off and finished ground.

Adopted 5 March 1984

I

Q July 1984, ISI

Gr 4

IS : 704 - 1984
TABLE 1 DIMENSIONS FOR OCTAGONAL CROW-BARS CHISEL AND HAMMER ENDS ( Clause 3.1 ) All dimensions in millimetres. (ORDINARY) WITH

I.
Nominal Mass kg =
,

!!G
Width Across Flat§ 6 Le:ath Chisel End C Diameter of Hammer `I;" Ground Portion Width
E

Lenjth

Static Thickness
at Start of Cutting Edge G

Load Test Load
W*

Cutting
_ Edge F

Distance
Between Grip and Loading Point P*

: :

.l 1 000 000 1 000

22 ;;

% ;:

Z! $0"

:25 :02

6 : 8

65 t

790 710 790 760

5: 181 136

s 1;

1 650 : %

2; $2

7609 ;"5

20 22 25 30

22 32 30"

6 :

9 : 6

1 450 1 450

:z :`: between the

Note - Shape of the cutting edge, okal ( see figure above ) or straight manufacturer and the purchaser.
*See Fig. 1 in 8.2.

cut,

shall

be as agreed

8.2 the

portion nearest to Static Load Test - The bar shall be rigidly gripped horizontally on the straight working end and a specified load is suspended at the free end for half a minute (see Fig. 1 ). The

weight to be suspended and the distance between the grip and the loading point for different types of The gripping tools may be in the form of a pair of bars shall be as specified in the respective tables. blocks either with straight face or shaped partially or fully to the shape of the bar itself. The maximum length of the gripped portion shall not exceed 75 mm. The bar shall show no sign of distortion, damage or permanent set over 8 mm. .4+13
mm

FIG. 1

STATIC

LOAD

TEST ARRANGEMENT

2

IS : 704

- 1984

TABLE

2

DIMENSIONS FOR BENT CHISEL

OCTAGONAL AND POINT 3.1 )

CROW-BARS ENDS

WITH

( Chuse

All dimensions in millimetres.

1.5

Nominal Mass kg z

Length A

Static

Load

Test

Distance Between Grip and Loading Point P*

Load W" kg

10 ::

1 520 1 680 1 830

1 240 1 300 1 550

I

113 113 91

I

*See Fig. 1 in 8.2.

8.3 Falling Weight Test - When required by the purchaser, the claw-bars shall also be subjected to the falling weight test. The claws of the bar shall bs placed apout 13 mm under the head of a standard dog spike rigidly placed and so located as to hold the bar in the horizontal position. A weight of 64 kgf shall be dropped from a height of 300 mm at a point of about 150 mm from the free end. At the end of the test, there shall not be any crack in the claws or any permanent set at the claws or in the bar.

3

IS:704-1984
TABLE 3 DIMENSIONS PACKING AND FOR ROUND CROW-BARS, STRAIGHTENING

( Clause 3.1 ) All dimensions in millimetres.

Nominal Mass kg =

Length A

Static

Load Test

' Distance Between Grip and Loading Point P*

Load W* kg

1: *See Fig. 1 in 8.2.

1 520 1 680

1 300 1 450

1

:1

TABLE

4

DIMENSIONS CHISEL

`FOR ROUND AND HAMMER

CROW-BARS ENDS

WITH

( Clause 3.1 ) All dimensions in millimetres.

A

L

E

Nomind Mass kg

Diameter

B

LenoQfth
Chisel `c"" Groqfnd Porzon

Width

Thickness at Start of Cutting idge

Cutting Ed;e

Diameter of HakZe' G

Static

Load Test

Distance' Between Grip and Loading Point P*

Load w* kg

5 6" 7 I"0

1 525 1 525 1 830 1 830 1830 2 440 1 830 2 440 2 440

% 64 70 70 70

1 320 1 450 1 320 1 450 1 400 1 700 1 420 2 060 1 900

35 fs5 45 ::

::

IS

;: 76

2 68

I

I
4

*See Fig. 1 in 8.2.

TABLE

5 DIMENSIONS

FOR

ROUND All

CROW-BARS ( Clause 3.1 )

WITH

CHISEL

AND

CLAW

ENDS

dimensions

in millimetres.

ii__

G +
J

--- t

I I _-_-_
13 ? E

Nominal Mass kg

Diameter B Length of Chisel `Ed D Width of Cutting `gd

LeYh
-

G

H

K

Length of Each Yw

Total Width czw End M

Gap at Claw End N

I

Static

Load Test

Distance Between Grin and Loadi?* Point

Load W* kg

__
18 :: 25 48 :: 76 13 13 16 16 2'5 3.0 3'0 4'0 32 z 51

3 5 184.5

685 1 070 1 250 1 680

:1
64 64

460 840 1016 1320

205 113 1::

*See Fig. 1 in 8.2.

IS:704-1984
TABLE 6 DIMENSIONS FOR ROUND CROW-BARS AND POINT ENDS ( Clause 3.1 ) All dimensions in millimetres. WITH CHISEL

D-

c-

----E

Nominal Mass kg

LeYh

&ameter B

L=;#i',",pf `2

Length of Pointed E E;d

I

Static

Load Test

Distance Between Grip anpdoikFding P*

Load W* kg

174.25

1 200 1 650

1::

900 1 320

144 111

*See Fig. 1 in 8.2.

TABLE

7 DIMENSIONS

FOR

SQUARE

CROW-BAR ( Clause 3.1 )

WITH

CHISEL

AND

HAMMER

ENDS

All dimensions in millimetres. .

I '

t II

Nominal Mass kg = Length A

SzW&
B

Length of Chisel End C

Width of Ground PorIion

Tl~~~r~~~~s;j Cutting Edf= of Cutting, Edge E

Static

Load Test

Distance Between Grip a;zik;ading P*

Load W* kg

5'3

1 650

20

60

20

5

10

1 450

25

*See Fig. 1 in 8.2.

6

IS:704

-1984

TABLE 8 DIMENSIONS

FOR CLAW-BARS

( Cli3use3.1 )

All dimensions in millimetres.

c-75--

A-

-cr
B -

W

1680 f 16

I

Nominal Mass kg z

LTogq;t,hdOf Lezqth Claw Por:ion E;d

c

D

Length of Each ";w

RI

RP

Static Load Test
Distance Between Grip anpdoizading P* Load kV;

_11 11 1190 1170 50 120 38 67 40 68

40 68
100

_32 25 1370 1 350 91 91 200

*See FTg. 1 in 8.2.

-

-

9. Preservative

boiled
10.

Treatment - Suitable linseed oil shall be applied.

anticorrosive

coating

like varnish

all over or dipping

in double

Supply of Crow-bars and Claw-bars - General requirements relating to the supply of crow-bars for supply of metallurgical and claw-bars shall conform to IS : 1387-l 967 `General requirements materials ( first revision )`.
11. Packing - The bars shall be securely packed in suitable packing boxes of size convenient for handling in transit, or bundled and secured suitably with the wire as may be specified by the purchaser. No package shall contain more than Each type and size of the bar shall be kept separate and packed. one variety.

12. Marking name, initials 12.1

- Each bar shall be clearly and legibly stamped or embossed with the manufacturer's or recognised trade-mark and year of manufacture.
Marking -

ISI Certification

Details available

with the Indian 7

Standards

Institution.

IS : 704 - 1984
TABLE 9 DIMENSIONS FOR FIREMAN'S CROW-BARS

( Clause 3.1 ) All dimensions in millimetres.

\

-4-3
$ECTION xx

X ----I
A

L75

I

Nominal
Mass

c Le:gth D iemSeter

D

Static

Load Test

kg z Distance Between Grip a;tik;ading P* Load W* kg

3.5 6'5 IX

700 1 200 1 800 500

30

5":

K

450 1 000 1 550 240

205 136 113 91

35 z:

z

:5"

*See

Fig. 1 in 8.2.

13. Sampling - Unless otherwise agreed to between the buyer and the seller, the procedure given in IS : 2500 ( Part 1 J-1973 `Sampling inspection tables : Part 1 Inspection by attributes and by count of defects ( first revision )' may be followed for sampling inspection. The sampling plans for various characteristics shall be according to 13.1 and 13.2. 13.1 For inspection of shapes, dimensions, manufacture and finish, single sampling plan with inspection level III and acceptable quality level ( AQL) of 4 percent given in Tables `l and 2 of IS : 2500 ( Part 1 )-1973 shall be adopted. 13.2 For inspection of hardness and other tests, single sampling plan with inspection level I and acceptable quality level (AQL) of 6'5 percent, given in Tables 1 and 2 of IS : 2500 ( Part I ) - 1973 shall be adopted.

EXPLANATORY

NOTE
taken up to

This standard was first published in 1957. The first revision, issued in 5968, was express the dimensional and other requirements in metric units.

This revision has been taken up in order to include square type crow-bars, and fireman's crowbars. The mass of the crow bars has been made recommendatory, since the length and width across flats or diameter of the crow-bars have been toleranced in accordance with the modern manufacturing practices. 8
Printed at Printrade, New Delhi, tndia

#

'I . ,

'AMENDMENT NO. 1 NOVEMBER 1986 ; . ,. .; .,.7(-j

!S: 7b4,yJ 994.. SPECIFICATION FOR CROW-E4RS AN)
" .:...

(&go

1, clause 8.1, i!im 3)

-

Substitite

.

'three times' for 'five'times'.

-.

,

.

AMENDMENT IS 704 : 1984

NO. 2 MAY 1996 TO SPECIFICATION FOR CROW-BARS AND CLAW-BARS
(Second Revision)

( Page 1, clause 3.2, line 2 ) - Substitute `IS 3739 : 1987 Dimensional tolerances for carbon and alloy constructional products (first revision )' for `IS : 3739 - 1972 Dimensional tolerances for carbon and alloy constructional steel products'. ( Page 7, clause 10, line 2 ) - Substitute `IS 1387 : 1993 General requirements for the supply of metallurgical materials ( second revision )' for `IS : 1387 - 1967 General requirements for the supply of metallurgical materials (firsr revision )`. ( Page 8, clause 13, line 2 ) - Substitute `IS 2500 ( Part 1 ) : 1992 Sampling inspection procedures : Part 1 Attribute sampling plans indexed by acceptable quality level (AQL) for lot-by-lot inspection ( second revision )' for `IS : 2500 ( Part 1 ) - 1973 Sampling inspection tables : Part 1 Inspection by attributes and by count of defects (first revision )`. ( Page 8, clauses 13.1 and 13.2, line 2 ) - Substitute `Tables I and II-A of IS 2500 (Part 1) : 1992'jor `Tables 1 and 2 of IS : 2500 ( Part 1) - 1973'.

(PE06)

Reprography Unit, BIS, New Delhi, India